MIMO-OFDMA系统下行链路的一种自适应资源分配方案

刘敏; 徐大专

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MIMO-OFDMA系统下行链路的一种自适应资源分配方案

电气工程 | 更新时间：2023-11-14

- MIMO-OFDMA系统下行链路的一种自适应资源分配方案
- An Adaptive Resource Allocation Scheme for MIMO-OFDMA Downlinks
- 工程科学与技术 2010年42卷第3期页码：177-183
- 作者机构：
  
  1. 南通大学电子信息学院
  2. 南京航空航天大学信息科学与技术学院
- 作者简介：
- 基金信息：
  
  江苏省自然科学基金资助项目(BK2007192)
- DOI：
  中图分类号：
- 纸质出版日期：2010，
  
  网络出版日期：2010-3-18，
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刘敏,徐大专.MIMO-OFDMA系统下行链路的一种自适应资源分配方案[J].工程科学与技术,2010,42(3):177-183.

Liu Min, Xu Dazhuan. An Adaptive Resource Allocation Scheme for MIMO-OFDMA Downlinks[J]. Advanced Engineering Sciences, 2010,42(3):177-183.
刘敏,徐大专.MIMO-OFDMA系统下行链路的一种自适应资源分配方案[J].工程科学与技术,2010,42(3):177-183. DOI：

Liu Min, Xu Dazhuan. An Adaptive Resource Allocation Scheme for MIMO-OFDMA Downlinks[J]. Advanced Engineering Sciences, 2010,42(3):177-183. DOI：

摘要

中文摘要: 为了在MIMO-OFDMA系统中利用延时的信道状态信息极大化系统吞吐量，提出了一种结合正交空时分组码与特征波束形成的传输方案，并在上述传输方案中提出一种低复杂度的两步子载波分配算法。首先根据用户平均信道质量与速率需求分配带宽，然后遵循标定星座距离最小的准则依次将各子载波指派给用户，获得多用户分集增益。最后在子载波间分配功率确保达到用户速率要求。仿真结果表明，该方案能充分利用具有时延的信道状态信息和多个发射天线有效提高系统吞吐量。

Abstract

Abstract:In order to maximize the throughput of MIMO-OFDMA downlinks by using delayed channel state information

an adaptive transmission scheme combining Orthogonal Space-Time Block Code and eigen-beamforming was proposed

and subsequently a computationally efficient two-step sub-carrier allocation algorithm was presented. This scheme allocated bandwidth for every user based on their average channel state and data rate requirement. Then each sub-carrier was assigned to users according to the minimum scaled constellation distance criterion

capturing multi-user diversity gain. Finally available power was distributed among sub-carriers to ensure each user’s data rate requirement. Simulation results showed that the scheme could make use of delayed channel state information and multiple transmit antennas to increase throughput.

关键词

多用户正交频分复用多输入多输出资源分配延时信道状态信息

Keywords

multi-userOrthogonal Frequency-Division MultiplexingMultiple-Input-Multiple-Outputresource allocationdelayed channel state information

references

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